Question: What position did Alexander Dubcek hold on December 12, 1989?
Paraphrase: On Dec 12, 1989 what was Alexander Dubcek's position?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q150543 p:P39 ?s . ?s ps:P39 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1989')) }